金属热处理 ›› 2020, Vol. 45 ›› Issue (3): 133-139.DOI: 10.13251/j.issn.0254-6051.2020.03.026

• 工艺研究 • 上一篇    下一篇

退火工艺对热变形TC21合金组织与性能的影响

杨春林1, 张松2, 欧梅桂2   

  1. 1. 贵阳学院 化学与材料工程学院, 贵州 贵阳 550003;
    2. 贵州大学 材料与冶金学院, 贵州 贵阳 550025
  • 收稿日期:2019-11-25 出版日期:2020-03-25 发布日期:2020-04-03
  • 通讯作者: 欧梅桂,教授,主要从事材料结构与性能研究,E-mail:34048449@qq.com
  • 作者简介:杨春林(1977—),男,副教授,硕士,主要从事材料成形加工研究,E-mail:370013137@qq.com。
  • 基金资助:

    贵州省一流大学专业建设项目(2017158134);贵州省科技厅项目(黔科合基础[2018]1027,黔科合支撑[2019]2165号);贵州省教育厅工程研究中心项目(黔教合KY字[2017]016);贵阳市科技局-贵阳学院科研专项资金(GYU-KYZ(2019~2020)PT23-05)

Effect of annealing on microstructure and properties of hot deformed TC21 alloy

Yang Chunlin1, Zhang Song2, Ou Meigui2   

  1. 1. College of Chemistry and Materials Engineering, Guiyang University, Guiyang Guizhou 550003, China;
    2. College of Materials and Metallurgy, Guizhou University, Guiyang Guizhou 550025, China
  • Received:2019-11-25 Online:2020-03-25 Published:2020-04-03

摘要:

研究了高温热变形后TC21合金棒材经一重及二重退火后其组织与性能的变化。结果表明:一重退火后,变形的α相在不同程度上发生了再结晶并等轴化,随退火温度升高,α相等轴化更为明显,且等轴α相粗化。二重退火后组织进一步等轴且均匀化,二重退火工艺略微降低了合金的强度,但是明显提高合金塑性。合金经过900 ℃×45 min,AC+590 ℃×4 h,AC处理后,断面收缩率提高了4.11%,伸长率提高了6.71%。

关键词: TC21合金, 双重退火, 热变形, 组织, 性能

Abstract:

The microstructure and properties of TC21 alloy bar after single and double annealing were studied. The results reveal that the deformed α phase is recrystallized and equiaxed to different extents after the single annealing. With the increase of annealing temperature, α phase is equiaxed more clearly and equiaxed α phase is coarsening. After the double annealing, the microstructure is further equiaxed and homogenized. The double annealing process slightly reduces the strength of the alloy, but significantly improves the plasticity of the alloy. After the treatment of 900 ℃×45 min, AC+590 ℃×4 h, AC, the section shrinkage rate and elongation rate of the alloy are increased by 4.11% and 6.71%, respectively.

Key words: TC21 alloy, double annealing, hot deformation, microstructure, mechanical properties

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